Global Positioning System(GPS) is a new generation of satellite navigation and positioning system which possesses the abilities of real time and 3D all azimuth navigation and positioning in sea, land and air.
Along with the development of GPS (Global Positioning System), which has the global, all-weather, and continuous navigation and positioning as well as good anti-interference performance, GPS technology and devices have developed rapidly in the military and civil field.
The fourth chapter design the navigation system based on multi sensor information. By the environment model said in the above chapter, according to the requirement of mobile robot navigation and localization and for the utilization, explicate the sensor system how to collect and process environment information, the information fusion technology of applying Kalman filter in robot self locating, and the information fusion technology of applying Dempster-Shafer in realizing and avoiding obstacle, also the dynamic path planning technology based on line expend for grid map.
Spread spectrum communication techniques have many advantageous properties, such as inherent capability to reject interfering signals, privacy, increasing transmission capacity, and sharing bandwidth with other narrowband communication systems, which have been widely used in military communication system, navigation and localization system, personal wireless communication etc.
GIS(Geographic Information System) Traffic flow analysis based on GPS(Global Positioning System) technology, is a technology which uses satellite navigation technology, conducts intelligence analysis and expresses the traffic status on the GIS system. It helps raising the utilization rate and has great affect on solving the traffic problem brought by rapid development of the city.
基于GPS(Global Positioning System,全球卫星定位系统)的GIS(Geographic Information System for Transprotation,交通用地理信息系统)交通流分析(Traffic Flow Analysis)是应用在智能交通信息平台中,以提高道路利用率,使道路更加通畅,利用GPS卫星导航与定位系统,对交通状况进行智能化分析,并将交通状况在所在的地理信息系统中表达出来的一种技术;
The simulation results show that there is a locality in a mobile host roaming. It should be pointed out that theories,methods and results introduced in this dissertation are quite useful in such research areas as mobile software including mobile agents,mobile e-commerce,satellite navigation,global position system,digital battlefield in military affairs,rescue,wireless networks,wireless web surfing,the improvement of current mobile communication networks,and the design of the next generation mobile communication networks.
本文的研究成果，对于移动软件(Mobile Software)如移动agent(Mobile Agent)、移动电子商务(Mobile E-Commerce)、卫星导航与定位、数字战场(Digital Battlefield)、抢险救灾、无线计算机网络、无线“网上冲浪”(Wireless Web Surfing)、现有移动通信系统的改进以及新一代移动通信系统的高效运行等领域的研究，有着一定的借鉴作用。
The ionospheric time delay is one of the main error sources in C/A code GPS navigation and positioning applications.
The Global Positioning System (GPS), in addition to providing precise navigation and positioning information, produces precise time and frequency measurements.
The data were acquired as a near-zero offset, single-channel survey using a 15 in3 water gun as the source, and differential GPS for navigation and positioning.
Doors are common objects in indoor environments and their detection can be used in robotic tasks such as map-building, navigation and positioning.
Such timers are particularly well-suited to serve in distributed real-time systems, since, by employing the exact UTC received from the satellites of GPS (the global navigation and positioning system), synchronisation is not needed anymore.
The development of GPS/DR integrated navigation system for vehicle is given and the mathematical model of this system is founded. This system adopts Kalman filtering algorithms to process data, the information fusion methods and the errors correction methods of sensors are proposed. Experimental results demostrate the effectiveness of this integrated navigation system.
Differential theory plays an important role in GPS navigation and positioning. A unified differential model is established based on analayses on the fundamental measurement data of GPS. The equivalence relations among different models are discussed.
The development Qf Dead - Reckoning system is given and the character of gyroscopes is discussed. The Extended Kalman filter is presented on the basis of nonlinear mathematical model. Experimental results demostrate the effectiveness of the Dead-Reckoning system.